Niloy Sen
ID 484901
Born : 1980 Cat. M45 Ultrarunner since 2013 USA
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
53
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
1
Countries visited ?USAUnited States
65,2%
Rank quotient ?This runner's calculation uses 58 eligible race(s): Σ(rank − 1) = 4 543; Σ finishers = 6 969. 4 543 / 6 969 × 100 = 65.19%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed58
Km — ultra races5 307 km
> 100 km10
> 160 km10
> 200 km2
Longest race402,3 km
2nd Cocodona 250 Mile Race — 2/5/2022

Km per year (ultra races)

1 105
9 races
2022
411
4 races
2023
461
5 races
2024
461
7 races
2025
100
2 races
2026

Race types (share of distance)

Road2,1%
Trail97,9%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 31
🏅 Top 3 M2
Longest winning streak0
Current streak0

Records

50 km4h55'32100 km12h55'0050 mi11h03'56100 mi26h53'106 h59,55 km

HISTORY

58 race(s)
DateRacePerf.Rk
2026
04.04 50km USA17th Diablo Trails Challenge 9:13:19 h105
07.03 50km USA2nd Skyline Ridge Trail Run 7:52:00 h30
2025
27.09 50mi USA43rd Dick Collins Firetrails 50 Mile 12:10:36 h49
31.08 50km USA15th Crystal Springs 50 km Summer Trail Run 6:56:00 h16
14.06 50km USA1st Skyline Ridge Trail Run 6:31:50 h5
10.05 100km USA42nd Quicksilver 100 km Endurance Run 16:03:29 h101
08.03 50mi USA13th Marin Ultra Challenge 50 Mile Race 12:04:03 h85
25.01 50km USA13th Fort Ord 50K Trail Run 5:27:02 h18
11.01 50km USA4th No Hands Trail Run 6:38:00 h31
2024
02.11 100mi USA24th Rio Del Lago 100 Mile Endurance Run 27:26:49 h118
12.10 50km USA38th Ruth Anderson Ultra 50km 4:55:32 h21
04.05 100km USA27th Miwok 100k Trail Race 13:49:18 h103
27.04 100km USA11th The Canyons Endurance 100 km Run 16:45:02 h228
02.03 50km USA3rd North Marin Ridge 50km Run 5:50:50 h6
2023
29.09 100mi USA25th The Bear 100 Mile Endurance Run 34:52:59 h204
29.07 100km USA9th Never Summer 100k 23:39:03 h191
06.05 100km USA26th Miwok 100k Trail Race 12:55:00 h80
18.02 50km USA2nd North Marin Ridge 50km Run 5:57:52 h11
2022
05.11 100mi USA22nd Rio Del Lago 100 Mile Endurance Run 27:14:09 h103
07.08 50km USA41st Skyline 50k Endurance Run 6:17:47 h66
03.06 100mi USA9th Scout Mountain 100 Mile Ultra Trail 35:42:10 h21
02.05 250mi USA2nd Cocodona 250 Mile Race 4d 20:08:34 h103
09.04 50km USA13th Diablo Trails Challenge 6:42:59 h20
12.03 50mi USA10th Marin Ultra Challenge 50 Mile Race 11:03:56 h44
19.02 50km USA1st North Marin Ridge 50km Run 6:06:00 h4
05.02 100km USA8th Ordnance 100K 14:49:05 h15
22.01 50km USA1st No Hands Trail Run 7:30:01 h26
2021
31.12 6h USA11th New Years One Day 6 Hour Run 59.545 km3 🥉
06.11 100mi USA21st Rio Del Lago 100 Mile Endurance Run 26:53:10 h123
23.10 100km USA38th Quicksilver 100 km Endurance Run 14:03:50 h59
24.04 100km USA8th The Canyons Endurance 100 km Run 19:07:29 h246
2020
09.10 238mi USA4th Moab 240 Endurance Run 4d 13:39:40 h113
22.02 52km USA3rd Mount Umunhum Trail Run 6:39:17 h37
2019
02.11 100mi USA19th Rio Del Lago 100 Mile Endurance Run 28:51:48 h192
27.07 50mi USA6th Pioneer Spirit 50M 14:12:30 h18
31.05 100mi USA6th Scout Mountain 100 Mile Ultra Trail 34:35:11 h34
19.05 50km USA32nd Ohlone 50K Wilderness Run 7:50:15 h50
11.05 100km USA36th Quicksilver 100 km Endurance Run 15:53:34 h118
13.04 50km USA11th Diablo Trails Challenge 8:16:58 h81
09.03 50mi USA8th Marin Ultra Challenge 50 Mile Race 13:20:38 h168
2018
14.04 50km USA10th Diablo Trails Challenge 8:19:14 h74
10.03 50mi USA7th Marin Ultra Challenge 50 Mile Race 14:09:21 h159
24.02 52km USA1st Mount Umunhum Trail Run 8:22:52 h66
2017
09.09 100mi USA11th Headlands Hundred 100 Mile Endurance Run 32:16:09 h64
29.04 100km USA4th The Canyons Endurance 100 km Run 19:17:33 h223
15.04 50km USA9th Diablo Trails Challenge 8:13:30 h81
11.03 50mi USA6th Marin Ultra Challenge 50 Mile Race 13:52:09 h130
2016
14.05 60mi USA6th Born to Run Ultra 60 Mile Marathon 15:46:09 h17
17.04 50km USA8th Diablo Trails Challenge 9:57:33 h138
26.03 50mi USA4th San Francisco 50 Mile Endurance Run 14:18:22 h34
12.03 50km USA5th Marin Ultra Challenge 50 km Race 7:32:59 h160
2015
11.07 50km USA5th Golden Gate 50 km Summer Trail Run 8:51:04 h35
2014
11.10 50km USA6th Skyline to the Sea 50km 6:35:40 h79
27.09 50km USA13th Stevens Creek Striders 50K 7:26:37 h31
02.08 50mi USA2nd San Francisco 50 Mile Endurance Run 12:51:06 h47
12.07 50km trail race USA4th Golden Gate 50 km Summer Trail Run 7:00:49 h47
08.06 50km USA3rd Big Basin - Skyline to the Sea 50 km 7:01:57 h81
2013
29.12 50km USA12th Woodside Trail Run 50K 7:37:49 h89